how does reed switch work

Reed Switches consist of two flat ferromagnetic reeds sealed in an inert atmosphere within a glass capsule. In the presence of a magnetic field the reeds are attracted to each other and close to complete the magnetic and electric circuit. Our reed switches are manufactured to the highest standards ensuring long life and consistent performance. Reed Switches are available in a wide range of formats and contact ratings.

A float switch is a device used to detect the level of liquid within a tank or vessel. The switch can control a pump or be used as an indicator or alarm. It can also be used to control other integrated components. Our liquid level sensors and switches provide high-reliability monitoring and detection of a wide range of fluid media. Requirements can range anywhere and have been used in cooking oil, hydraulic fluids, diesel fuel tanks, water and wastewater, biohazards and even deionized or potable water. They are effective in a multitude of environments

Reed switches are commonly used within the industry and provide a highly reliable yet safe operation.

Deeter Electronics manufacture and supply a variety of liquid level sensors using reed switches, the design in choice for many applications, as they are effective in wet and dirty conditions with wide operating temperature ranges.


The durable construction of these reed switch designs ensures long, trouble-free service. Because the effects of shock, wear and vibration are minimised, these hermetically sealed switches provide precise repeatability. The sensor actuation points remain constant over the life of the unit.